Archangel of Tithes

Oracle Text

As long as Archangel of Tithes is untapped, creatures can't attack you or a planeswalker you control unless their controller pays 1 for each of those creatures.

As long as Archangel of Tithes is attacking, creatures can't block unless their controller pays 1 for each of those creatures.

Card Rulings

6/22/2015 If you control an untapped Archangel of Tithes, your opponents can choose to not attack with a creature that must attack if able. The same is true with respect to an attacking Archangel of Tithes and a creature that must block if able.